Fixed hanging process on close

app.js

@@ -8,15 +8,17 @@ const BrowserWindow = electron.BrowserWindow
 const isDev = (process.env.NODE_ENV === 'DEV');
 
 let url = `file://${path.join(__dirname, '/dist/index.html')}`
+let mainWindow
 
-app.on('ready', () => {
-  let window = new BrowserWindow({
+function createWindow() {
+  // Create the browser window.
+  mainWindow = new BrowserWindow({
     width: 1124, 
     height: 800,
-    icon: path.join(__dirname, '/src/assets/icons/png/64x64.png')
+    icon: path.join(__dirname, '/icons/png/64x64.png')
   })
 
-  window.setMenu(null);
+  mainWindow.setMenu(null);
 
   contextMenu({
     showCopyImageAddress: true,
@@ -24,5 +26,35 @@ app.on('ready', () => {
     showInspectElement: isDev,
   });
 
-  window.loadURL(url)
+  mainWindow.loadURL(url)
+
+  // Emitted when the window is closed.
+  mainWindow.on('closed', function() {
+    // Dereference the window object, usually you would store windows
+    // in an array if your app supports multi windows, this is the time
+    // when you should delete the corresponding element.
+    mainWindow = null
+  })
+}
+
+// This method will be called when Electron has finished
+// initialization and is ready to create browser windows.
+// Some APIs can only be used after this event occurs.
+app.on('ready', createWindow)
+
+// Quit when all windows are closed.
+app.on('window-all-closed', function() {
+  // On OS X it is common for applications and their menu bar
+  // to stay active until the user quits explicitly with Cmd + Q
+  if (process.platform !== 'darwin') {
+    app.quit()
+  }
+})
+
+app.on('activate', function() {
+  // On OS X it's common to re-create a window in the app when the
+  // dock icon is clicked and there are no other windows open.
+  if (mainWindow === null) {
+    createWindow()
+  }
 })